Always lock the mutexes `cs_main` and `m_cached_tip_mutex` in
the same order: `cs_main`, `m_cached_tip_mutex`. Otherwise we may end up
in a deadlock.
`ClientModel::m_cached_tip_blocks` is protected by
`ClientModel::m_cached_tip_mutex`. There are two access paths that
lock the two mutexes in opposite order:
```
validation.cpp:2868 CChainState::ActivateBestChain(): lock cs_main
validation.cpp:2916 CChainState::ActivateBestChain(): call uiInterface.NotifyBlockTip()
ui_interface.cpp:52 CClientUIInterface::NotifyBlockTip(): go deep in boost
...
qt/clientmodel.cpp:255 BlockTipChanged(): lock m_cached_tip_mutex
```
and
```
qt/clientmodel.cpp:119 ClientModel::getBestBlockHash(): lock m_cached_tip_mutex
qt/clientmodel.cpp:121 ClientModel::getBestBlockHash(): call m_node.getBestBlockHash()
interfaces/node.cpp:200 NodeImpl::getBestBlockHash(): lock cs_main
```
From `debug.log`:
```
POTENTIAL DEADLOCK DETECTED
Previous lock order was:
m_cs_chainstate validation.cpp:2851
(1) cs_main validation.cpp:2868
::mempool.cs validation.cpp:2868
(2) clientmodel->m_cached_tip_mutex qt/clientmodel.cpp:255
Current lock order is:
(2) m_cached_tip_mutex qt/clientmodel.cpp:119
(1) ::cs_main interfaces/node.cpp:200
```
The possible deadlock was introduced in
https://github.com/bitcoin/bitcoin/pull/17993
96cb597325 gui: Avoid redundant tx status updates (Russell Yanofsky)
Pull request description:
This PR is part of the [process separation project](https://github.com/bitcoin/bitcoin/projects/10).
In `TransactionTablePriv::index`, avoid calling `interfaces::Wallet::tryGetTxStatus` if the status is up to date as of the most recent `NotifyBlockTip` notification. Store height from the most recent notification in a new `ClientModel::cachedNumBlocks` variable in order to check this.
This avoids floods of IPC traffic from `tryGetTxStatus` with #10102 when there are a lot of transactions. It might also make the GUI a little more efficient even when there is no IPC.
ACKs for top commit:
promag:
Code review ACK 96cb597325.
hebasto:
ACK 96cb597325
Tree-SHA512: fce597bf52a813ad4923110d0a39229ea09e1631e0d580ea18cffb09e58cdbb4b111a40a9a9270ff16d8163cd47b0bd9f1fe7e3a6c7ebb19198f049f8dd1aa46
In TransactionTablePriv::index, avoid calling
interfaces::Wallet::tryGetTxStatus if the status is up to date as of the most
recent NotifyBlockTip notification. Store height from the most recent
notification in a new ClientModel::cachedNumBlocks variable in order to check
this.
This avoids floods of IPC traffic from tryGetTxStatus with #10102 when there
are a lot of transactions. It might also make the GUI a little more efficient
even when there is no IPC.
This commit resolves the checkpoints -> validation -> checkpoints
cirular dependency by moving
`CheckPoints::GetLastCheckpoint(const CCheckpointData& data)` from
`checkpoints.cpp` to `validation.cpp`.
e8db6b8044 Qt: Fix update headers-count (Jonas Schnelli)
7bb45e4b7a Qt: update header count regardless of update delay (Jonas Schnelli)
Pull request description:
Update the block and header tip is constraint to have a minimal distance of 250ms between updates... which can lead to miss the last header update.
The modal overlay then assumes we are still in header sync and the view get stuck in "syncing headers,..." (while it's actually syncing blocks).
This removes the 250ms minimal delta for header updates as well as it fixes the correct display of how header updates should update the labels.
Tree-SHA512: 57608dac822b135cd604fc6ba1c80f25c0202a6e20bb140362026615d4bf243ef4fcc254a11bad36419c554a222a2f4947438d4ce44aa14041d1874751643d68
cb53b825c2 scripted-diff: Replace boost::bind with std::bind (Chun Kuan Lee)
2196c51821 refactor: Use boost::scoped_connection in signal/slot, also prefer range-based loop instead of std::transform (Chun Kuan Lee)
Pull request description:
Replace boost::bind with std::bind
- In `src/rpc/server.cpp`, replace `std::transform` with simple loop.
- In `src/validation.cpp`, store the `boost::signals2::connection` object and use it to disconnect.
- In `src/validationinterface.cpp`, use 2 map to store the `boost::signals2::scoped_connection` object.
Tree-SHA512: 6653cbe00036fecfc495340618efcba6d7be0227c752b37b81a27184433330f817e8de9257774e9b35828026cb55f11ee7f17d6c388aebe22c4a3df13b5092f0
A few "a->an" and "an->a".
"Shows, if the supplied default SOCKS5 proxy" -> "Shows if the supplied default SOCKS5 proxy". Change made on 3 occurrences.
"without fully understanding the ramification of a command" -> "without fully understanding the ramifications of a command".
Removed duplicate words such as "the the".
